MRI brain classification using support vector machine

The field of medical imaging gains its importance with increase in the need of automated and efficient diagnosis in a short period of time. Other than that, medical image retrieval system is to provide a tool for radiologists to retrieve the images similar to query image in content. Magnetic resonance imaging (MRI) is an imaging technique that has played an important role in neuroscience research for studying brain images. Classification is an important part in retrieval system in order to distinguish between normal patients and those who have the possibility of having abnormalities or tumor. In this paper, we have obtained the feature related to MRI images using discrete wavelet transformation. An advanced kernel based techniques such as Support Vector Machine (SVM) for the classification of volume of MRI data as normal and abnormal will be deployed

Graphical User Interface Design for Collaborative Virtual Environments

The project aims to study, evaluate, analysis a collaborative virtual environments (CVE's) software also known as networked virtual environments (NVE's), and suggest how to improve the existing user interface by designing an alternative graphical user interface (GUI) for CVE's software. To reduce cost, most current and operative CVE's use the Internet and standard PC to create a visual virtual environment (VE), which can be shared by a large number of users. This project discusses CVE's and the importance of using a good GUI for a CVE system

Heuristic Evaluation of Play4Fit Health and Fitness App: A Comparison Between Experts and Novices Evaluators

Heuristic evaluation (HE) can be used to effectively identify usability issues in various interfaces. However, it has not been widely used in evaluating smartphone apps, especially in the health and fitness domain. One reason is the lack of HCI experts, which makes incorporating HE into the design process difficult. This paper presents the results of a study that compared HE performed by three HCI experts and three novices in evaluating a gamification app for health and fitness on a smartphone. The study used Smartphone Mobile Application heuRisTics (SMART), which focuses on smartphone apps, and a severity rating scale to determine the severity of the usability issues. These issues were mapped to the SMART heuristic. The findings indicate that novices may identify usability issues that the experts overlooked. While the experts identified eighteen usability issues, the novices found only four; however, the novice’s findings may be used as a substitute for HE when experts are unavailable. Both experts and novices identified two similar usability issues, but their severity ratings differed. One possible solution to address the lack of usability issues identified by novices in HE is to use more novices instead of experts in the evaluation process

Heuristic Evaluation of Play4Fit Health and Fitness App: A Comparison Between Experts and Novices Evaluators

Heuristic evaluation (HE) can be used to effectively identify usability issues in various interfaces. However, it has not been widely used in evaluating smartphone apps, especially in the health and fitness domain. One reason is the lack of HCI experts, which makes incorporating HE into the design process difficult. This paper presents the results of a study that compared HE performed by three HCI experts and three novices in evaluating a gamification app for health and fitness on a smartphone. The study used Smartphone Mobile Application heuRisTics (SMART), which focuses on smartphone apps, and a severity rating scale to determine the severity of the usability issues. These issues were mapped to the SMART heuristic. The findings indicate that novices may identify usability issues that the experts overlooked. While the experts identified eighteen usability issues, the novices found only four; however, the novice’s findings may be used as a substitute for HE when experts are unavailable. Both experts and novices identified two similar usability issues, but their severity ratings differed. One possible solution to address the lack of usability issues identified by novices in HE is to use more novices instead of experts in the evaluation process

Visitors' Emotions, Touristic or Spiritual Experiences in Historic Churches : The Development of Church Experience Scale (CES)

AbstractIn this paper we describe the development of the Church Experience Scale (CES) that allows us to measure visitor experience in historic churches, both with and without multimedia guides and other technologies. This study was carried out with 272 respondents at three historic churches in York, UK. Respondents for this study were visitors to these churches who were asked to complete a questionnaire immediately after their visit. A full psychometric scale development procedure was used which resulted in the Church Experience Scale (CES) which has five components: Enjoyment, Intellectual Stimulation and Curiosity; Emotional and Spiritual Experience; Immersion; Information Overload; and Knowledge and Learning. The usefulness of the scale in investigating visitors’ experiences in historic churches is explored. An initial comparison between inactive and an active historic church were compared using CES

EVALUATION OF SEAT VIBRATION SOURCES IN DRIVING CONDITION USING SPECTRAL ANALYSIS

Seat vibration is one of the major causes of discomfort in moving vehicle. Tyre, engine, drivetrain and aerodynamic forces excite the cabin and interior through various pathways. In this paper, the contributions of tyre and engine vibration to seat excitations are studied. Virtual Source Analysis (VSA) is implemented to decompose the source signals into incoherent phenomena. Studying these phenomena (virtual sources) shows the amount and frequency bands that physical sources affect the seat vibration as the response channel. Experiment is conducted while riding on smooth and bumpy roads. Road roughness is characterized using International Roughness Index (IRI). VSA technique approve that tyre is the main source of seat vibration for the moving vehicle. Seat vibration has significant values below 400 Hz and tyre is found to be the dominant source of excitations for both smooth and bumpy roads. For smooth road, strong engine harmonics below 200 Hz also has some involvements. But in bumpy road, tyre vibration rise up and become the dominant broadband source of excitations. Tyre damper and engine mount Frequency Response Function (FRF) analysis show that these parts are designed to be highly efficient below 1400 Hz and 200 Hz, respectively. These ranges are identical with those that were found as the critical operational frequency spans in VSA

Incorporating Heuristic Evaluation (HE) in the Evaluation of Visual Design of the Eco-Tourism Smartphone App

Heuristic Evaluation (HE) has proven to be important in the development of different computer systems but has not been incorporated in the development of eco-tourism smartphone applications. This results inusability issues that significantly affect user experience (UX) as discussed in literature. This study reports the HE in the design and development of Niranur Agro Farm (NAF) eco-tourism smartphone applications, which could improve UX. Eight experts participated in this study, utilizing the SMART mobile usability heuristic developed for mobile application and the severity rating scale to determine usability issues. The HE findings indicated that 22 usability issues were identified. One issue was rated 4 (catastrophe), four issues were rated 3 (major problem), twelve issues were rated 2 (minor problem) and five issues were rated 1 (cosmetics). Although there are issues rated as 4 and 3, the majority of the issues were considered to be minor (1 and 2 on the scale). Results indicated that it is crucial to incorporate HE into the design and development of the eco-tourism smartphone app to minimize the usability issues faced by users. It further validated that utilizing a specific heuristic for smartphone applications would ensure that all usability issues are correctly categorized and remedied

Invariance in Transverse Momentum of Photons in Double-slit Experiment

One of the intriguing mystery in modern physics is the quantum interference phenomena, which the behaviour of photons in double-slit experiment is still ambiguous. Instead of relying on the naive probabilistic point of view, Bohmian mechanics provides the ground base for interpreting quantum system in a deterministic way closely related to classical mechanics such as it constructs the photon trajectory for the double-slit set up. The appearance on the bending in the constructed photon trajectory seem to contravene the notable law of conservation of momentum. Here, we report on conservation of the transverse momentum of photon trajectories based on numerical solution of Bohmian mechanics in double-slit set up for single photon, pair of photons and ensemble of photons until interference pattern is produced. It is shown that the total transverse momentum in the system of Bohmian mechanics is invariance due to the non-local action of quantum potential

Penentuan faktor-faktor tanah ke atas tumbesaran gajus di kawasan tanah Bris : bahagian I

Penyelidikan mengenai gajus adalah amat kurang. Oleh yang demikian, satu kajian ladang telah dijalankan untuk menentukan perkaitan antara kedalaman lapisan keras spodik, iaitu ciri semulajadi tanah, dan paras kandungan bahan organan ke atas tumbesaran gajus. Kajian ini dijalankan di ladang gajus Perusahaan Gajus Malaysia (C/MA). Besut, di mana jenis-jenis tanah berasaskan kedalaman horizon spodik telah ditentukan terlebih dahulu. Teknik-teknik ringkas, yang direka khas untuk kajian ladang telah digunakan. Kedalaman lapisan keras spodik tidak menunjukkan kesan yang bererti ke atas tumbesaran gajus yang diukur dari segi ke tinggian pokok dan luas permukaan sudur pokok. Ini adalah kerana pokok tersebut tidak mempunyai sistem akar yang dalam. Walaubagaimana pun, kandungan bahan organan tanah memberikan kesan yang sangat bererti ke atas ketinggian pokok serta luas permukaan sudur pokok dan memberikan angkali korelasi r = 0.536 dan r = 0.495 (P < 0.01) tiap-tiap satunya. Seterusnya bahan organan tanah dipengaruhi secara tidak langsung oleh kedalaman lapisan keras spodik seperti yang ditunjukkan oleh angkali korelasi yang negatif (r =-·0.364; P < 0.05)